linux-kernel - Re: Re-tune x86 uaccess code for PREEMPT

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Message-ID: <1376200711.15334.3.camel@marge.simpson.net>
Date:	Sun, 11 Aug 2013 07:58:31 +0200
From:	Mike Galbraith <bitbucket@...ine.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	x86@...nel.org, mingo@...nel.org, torvalds@...ux-foundation.org
Subject: Re: Re-tune x86 uaccess code for PREEMPT_VOLUNTARY

On Sat, 2013-08-10 at 21:57 -0700, H. Peter Anvin wrote: 
> That sounds like an issue with specific preemption policies.

Actually, voluntary/nopreempt delta for _these_ loads was nil.

-Mike


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